Foaming behavior of 1-vinyl-2-pyrrolidone–methyl methacrylate copolymers under ScCO2

IF 1.3 4区医学 Q4 MATERIALS SCIENCE, BIOMATERIALS

Cellular Polymers Pub Date : 2020-08-04 DOI:10.1177/0262489320929226

Miriam Trigo-lopez, José A. Reglero Ruiz, Saúl Vallejos, C. Ramos, S. Beltrán, F. García, J. García

引用次数: 1

Abstract

We report on the preparation, characterization, and foaming behavior of cellular polymers based on 1-vinyl-2-pyrrolidone (VP) and methyl methacrylate (MMA). Samples with different feed ratios proportions of VP and MMA were prepared following the bulk radical copolymerization procedure, using commercially available monomers and testing two different initiators (photochemical and thermal), obtaining solid samples of around 1.5 mm thick. To evaluate the polymerization process, the chemical structure of VP/MMA copolymers was determined by proton nuclear magnetic resonance measurements. In a second step, single-batch supercritical carbon dioxide (CO2) foaming tests were carried out at different temperatures to evaluate the influence of the VP to MMA feed ratios and the foaming temperature in the density, the presence of solid outer skin, the CO2 sorption–desorption process, and the cellular morphology of the foamed polymers.

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1-乙烯基-2-吡咯烷酮-甲基丙烯酸甲酯共聚物在ScCO2下的发泡行为

我们报道了基于1-乙烯基-2-吡咯烷酮(VP)和甲基丙烯酸甲酯(MMA)的细胞聚合物的制备、表征和发泡行为。根据本体自由基共聚程序制备了不同进料比的VP和MMA样品，使用市购单体并测试了两种不同的引发剂(光化学和热)，获得了约1.5 mm厚的固体样品。为了评价聚合过程，用质子核磁共振法测定了VP/MMA共聚物的化学结构。第二步，在不同温度下进行单批次超临界二氧化碳(CO2)发泡试验，以评估VP与MMA进料比和发泡温度对发泡聚合物密度、固体外皮存在、CO2吸附-解吸过程和泡沫聚合物细胞形态的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cellular Polymers 工程技术-材料科学：生物材料

CiteScore

3.10

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Cellular Polymers is concerned primarily with the science of foamed materials, the technology and state of the art for processing and fabricating, the engineering techniques and principles of the machines used to produce them economically, and their applications in varied and wide ranging uses where they are making an increasingly valuable contribution. Potential problems for the industry are also covered, including fire performance of materials, CFC-replacement technology, recycling and environmental legislation. Reviews of technical and commercial advances in the manufacturing and application technologies are also included. Cellular Polymers covers these and other related topics and also pays particular attention to the ways in which the science and technology of cellular polymers is being developed throughout the world.